Save before opening another file-- always exits

[Burdy]

In 3.171, if you make a change to a data
file, don't save it, and then try to open
another file instead:  you get the
prompt 'do you want to save before opening
another file?'.  If you answer no, AHP
brings up the File Open dialog box and then
immediately closes AHP.

[X10 Pro]

I'm not seeing this when I try it here, but
we'll take a look at the code and see what's
going on.